When a playlist is finished and you have Autoplay enabled, the Playlist Radio automatically starts generating songs similar to the ones in the playlist. You should see the Hide song button on the right-hand side of the Now playing view.
If you don't see this symbol, try running a clean reinstallation of the app. This involves deleting the app data, which can sometimes cause issues when broken. Have a look at this guide for the device relevant steps.
Hope this helps. Don't hesitate to reach out again if you have more questions.
Help others find this answer and click "Accept as Solution".
If you appreciate my answer, maybe give me a Like.
“With freedom, flowers, books, and the moon, who could not be perfectly happy?” ― Oscar Wilde